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    <title>Document</title>
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<body>
    <script>
        // 使用then获取结果
        // console.log(1);
        // let p = new Promise((resolve, reject) => {
        //   console.log(2)
        //   resolve(3)
        //   console.log(4)
        // })
        // console.log(5)
        // p.then(res => {
        //   console.log(res) // 3
        // })
        // console.log(6)
        // 使用async和await获取结果

        console.log(1)
        let p = new Promise((resolve, reject) => {
          console.log(2)
          resolve(3)
          console.log(4)
        })
        console.log(5)
        async function abc() {
          console.log(6)
          let res = await p
          console.log(res) // 3
          console.log(7)
        }
        abc()
        console.log(8)
      </script>
</body>
</html>